549389 has 6 divisors (see below), whose sum is σ = 583914. Its totient is φ = 516800.

The previous prime is 549379. The next prime is 549391. The reversal of 549389 is 983945.

It can be written as a sum of positive squares in 3 ways, for example, as 100489 + 448900 = 317^2 + 670^2 .

It is not a de Polignac number, because 549389 - 2¹⁶ = 483853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 662 + ... + 1239.

It is an arithmetic number, because the mean of its divisors is an integer number (97319).

2⁵⁴⁹³⁸⁹ is an apocalyptic number.

It is an amenable number.

549389 is a deficient number, since it is larger than the sum of its proper divisors (34525).

549389 is a wasteful number, since it uses less digits than its factorization.

549389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935 (or 1918 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 549389 is about 741.2077981241. The cubic root of 549389 is about 81.9017761033.

It can be divided in two parts, 5 and 49389, that added together give a palindrome (49394).

The spelling of 549389 in words is "five hundred forty-nine thousand, three hundred eighty-nine".